211419989 has 4 divisors (see below), whose sum is σ = 230640000. Its totient is φ = 192199980.

The previous prime is 211419941. The next prime is 211420003. The reversal of 211419989 is 989914112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211419989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211419389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9609989 + ... + 9610010.

It is an arithmetic number, because the mean of its divisors is an integer number (57660000).

Almost surely, 2^211419989 is an apocalyptic number.

It is an amenable number.

211419989 is a deficient number, since it is larger than the sum of its proper divisors (19220011).

211419989 is a wasteful number, since it uses less digits than its factorization.

211419989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19220010.

The product of its digits is 46656, while the sum is 44.

The square root of 211419989 is about 14540.2884771933. The cubic root of 211419989 is about 595.7289176422.

The spelling of 211419989 in words is "two hundred eleven million, four hundred nineteen thousand, nine hundred eighty-nine".